My root partition is XFS on LVM.
Before I did anything, I had two physical disks which were combined using md as
/dev/md126 into a PV. That PV was the only member of a VG
centos_x5backup, and there were two LVs,
I was running out of disk space:
# df -h / Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos_x5backup-root 590G 509G 81G 86% /
I wanted more space on
root. I purchased two new drives, created a md
/dev/md0 combining them in raid1. That's active and resyncing:
md127 : active raid1 sda1 sdd1 999424 blocks super 1.2 [2/2] [UU] bitmap: 0/1 pages [0KB], 65536KB chunk md0 : active raid1 sdb1 sdc1 1171979840 blocks super 1.2 [2/2] [UU] [=============>.......] resync = 66.0% (773868928/1171979840) finish=393.1min speed=16874K/sec bitmap: 6/9 pages [24KB], 65536KB chunk
md0 as a new PV in the existing VG, and resized:
ssm resize -s+100%FREE /dev/mapper/centos_x5backup-root
xfs-growfs -d /:
# xfs_growfs -d / meta-data=/dev/mapper/centos_x5backup-root isize=512 agcount=13, agsize=36031232 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=437118976, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=70373, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data size unchanged, skipping
But after all that:
# df -h / Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos_x5backup-root 1.7T 1.6T 71G 96% /
What gives? df sees the space, but thinks its "used".
Why isn't the new space free?